US20110061751A1 - Tilting Disc Swing Check Valve - Google Patents

Tilting Disc Swing Check Valve Download PDF

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Publication number
US20110061751A1
US20110061751A1 US12/882,767 US88276710A US2011061751A1 US 20110061751 A1 US20110061751 A1 US 20110061751A1 US 88276710 A US88276710 A US 88276710A US 2011061751 A1 US2011061751 A1 US 2011061751A1
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United States
Prior art keywords
disc
check valve
swing check
seat ring
tilting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US12/882,767
Inventor
Worrapong Jumpol
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SIAM CAST IRON WORKS Co Ltd
Original Assignee
SIAM CAST IRON WORKS Co Ltd
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Filing date
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Priority claimed from TH901004167A external-priority patent/TH104274B/en
Application filed by SIAM CAST IRON WORKS Co Ltd filed Critical SIAM CAST IRON WORKS Co Ltd
Assigned to SIAM CAST IRON WORKS CO., LTD. reassignment SIAM CAST IRON WORKS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JUMPOL, WORRAPONG
Publication of US20110061751A1 publication Critical patent/US20110061751A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7898—Pivoted valves

Definitions

  • Water is a vital element of all lives in daily consumption since no plant or animal can survive without it.
  • water supply system plays an important role, particularly to people in urban areas, supplying sufficient amount of clean water for residents as well as for extensive growth of the country's industrial and business development.
  • wastewater management system also becomes a major concern.
  • quality and efficiency of valves performs critical function in controlling pressure within pipelines.
  • Various types of valves are hence designed to answer different objectives, from start and stop, control, inhibit backflow or redirecting flows.
  • Tilting Disc Swing Check Valve is a type of valve that inhibits back flow. It is uniquely different from other conventional swing check valves.
  • the disc of swing check valve will close slowly, and if there is any backflow in the pipeline, it will cause damages to the pump. If the disc closes fast, it will obstruct the water flow and create the water pressure losses during passing through the pipeline which called ‘Hear Loss’.
  • Tilting Disc Swing Check Valve allows liquid to flow only in single direction. It opens when liquid flows. When the flow stops, weight of valve's closing mechanism will swing back to close position and halt backflow.
  • the closing mechanism of Tiling Disc Swing Check Valve is a part of swinging disc, attached by a hinge, and set at a slant angle to provide quick closing and reduce water hammer. Its hinge pin axis could be placed either vertically or horizontally.
  • the Tilting Disc Swing Check Valve is recommended to be installed adjacent to a pump in order to prevent the pump's damage caused by liquid's backflow, and when the pump needs to be shut down for maintenance.
  • FIG. 1 illustrates the overall picture of tilting disc swing check valve, viewed three dimensionally and cross-sectional in angled position.
  • Tilting disc swing check valve consists of Body ( 1 ), Cover ( 3 ) on top. Both parts are made of grey cast irons for operating pressure of not more than 10 bar, and spheroidal graphite cast iron for operating pressure of 16 bar and above.
  • a cover gasket ( 14 ) is placed between the Body ( 1 ) and Cover ( 3 ). The body ( 1 ) and Cover ( 3 ) are held together with Cover bolt ( 13 ).
  • FIG. 2 illustrates the tilting disc swing check valve, at its back view (water outlet). It shows the “small button” protruding from top flange of the Body ( 1 ) in order to limit an opening angle of the Disc ( 2 ). This part is called “Stopper ( 16 )”.
  • FIG. 3 illustrates the tilting disc swing check valve in horizontal cut to show internal components, comprising of the Disc ( 2 ).
  • the Disc ( 2 ) is made of spheroidal graphite cast iron, which will inhibit the flow in cases that there is no pressure or backflow in the pipeline. It will automatically open when pushed by fluid with enough pressure. An increasing amount of pressure will increase an opening angle of the Disc ( 2 ).
  • a maximum angle of Disc ( 2 ) is limited by Stopper ( 16 ) that extrudes from the Body ( 1 ). This means the Disc ( 2 ) can open at maximum when operating pressure equals to an inclined degree between the Seat ( 17 ) and the Stopper ( 16 ), at the focal point on the center of hinge pin ( 9 ).
  • Disc Seat Ring ( 8 ) comes with two variations of materials. First is made of Nitrile Butadiene Rubber (NBR) or Ethylene Propylene Diene Rubber (EPDM). It has a round shape as shown in FIG. 11 .
  • NBR Nitrile Butadiene Rubber
  • EPDM Ethylene Propylene Diene Rubber
  • the metal Disc Seat Ring ( 8 ) comes in a similar shape of Body Seat Ring as shown in FIG. 12 . Both types of Disc Seat Ring ( 8 ) can prevent leakage of any liquid around the seating surfaces.
  • the rubber Disc Seat Ring ( 8 ) one side of it will be fixed on the perimeter of the disc ( 19 ) as shown in FIG. 5 . Another side will be pressed upon by Seat Holder ( 5 ) as shown in FIG. 7 which is made of spheroidal graphite cast iron, same material as the Disc ( 2 ). It holds the Disc Seat Ring ( 8 ) and the perimeter of the disc ( 19 ) together permanently and is also securely fastened by Seat Holder Bolt ( 12 ). Meanwhile, the metal Disc Seat ( 8 ) will be pressed up to the Disc ( 2 ), and will not need the Seat Holder ( 5 ).
  • FIG. 4 illustrates a cross-sectional and three dimensional view of the Body ( 1 ) showing internal structure consists of seating surface ( 17 ) in round shape. This area will be machined and provided with a groove for matching with a component called Body Seat Ring ( 7 ) which is made from bronze or stainless steel.
  • Body Seat Ring ( 7 ) is as per FIG. 9 . It will be assembled to the Body ( 1 ) by compression to increase the seating effectiveness of the Disc Seat Ring ( 8 ).
  • Body Seat Ring ( 7 ) is as per FIG. 10 and will be assembled to the Body ( 1 ) by threading.
  • Body Seat Ring ( 7 ) The surface of Body Seat Ring ( 7 ) that will contact with Disc seat ring ( 8 ) will be machined finely until it is very smooth.
  • Disc Seat Ring ( 8 ) When the valve closed, and there is no any liquid or pressure in the pipeline, Disc Seat Ring ( 8 ) will be tightly pressed to Body Seat Ring ( 7 ) by the weight of the Disc ( 2 ). In case of backflow occurs, the Disc Seat Ring ( 8 ) will be tightly pressed to the Body Seat Ring ( 7 ), and inhibits the liquid passing the Disc ( 2 ).
  • FIG. 5 illustrates two views of the disc ( 2 ). Picture of the left is a back view, and picture on the right picture is the cut Section A-A picture, consist of the Disc ( 2 ) and two Arms ( 21 ). At the end of both arms ( 21 ), there is a boss ( 22 ) in round shape providing a groove ( 23 ) for the pin ( 10 ) The position of this groove will fit to the groove of hinge pin ( 9 ).
  • FIG. 6 illustrates the Cover ( 3 ) in a dome shape. It helps distribute energy of pressure. It prevents liquid leaks from top of the valve. Lifting Lug ( 26 ) at the top of cover is provided for easy handling especially in large valves.
  • FIG. 8 illustrates the Hinge Pin ( 9 ), a cylindrical bar with the length equals to dimension of square boss ( 18 ) that protrudes from left end and the right end of the Body ( 1 ). Made of stainless steel, it hooks the boss ( 22 ) of the Disc ( 2 ) to balance and align the Body Seat Ring ( 7 ) of the Body ( 1 ) and the Disc ( 2 ). At one end of the Hinge Pin ( 9 ), a square cut ( 28 ) is made in order to fix with weight ( 27 ) as shown in FIG. 13 .
  • the boss ( 22 ) of the Disc ( 2 ) will be provided with groove ( 20 ) to fix the pin ( 10 ) at two ends as shown in FIG. 11 .
  • the pin ( 10 ) holds the boss ( 22 ) of the disc ( 2 ) with hinge pin ( 9 ) securely to prevent the leakage.
  • FIG. 1 illustrates sectional view of tilting disc swing check valve showing internal components as three dimensional views.
  • FIG. 2 illustrates tilting disc swing check valve from the back side (water outlet).
  • FIG. 3 illustrates image cut lengthwise of tilting disc swing check valve for overall components in two dimensional views.
  • FIG. 4 illustrates the cut image of the body of tilting disc swing check valve showing the seating area.
  • FIG. 5 illustrates the disc of tilting disc swing check valve.
  • FIG. 6 illustrates the cover of tilting disc swing check valve.
  • FIG. 7 illustrates the seat holder of tilting disc swing check valve.
  • FIG. 8 illustrates the hinge pin of tilting disc swing check valve.
  • FIG. 9 illustrates the compressed type body seat ring of tilting disc swing check valve.
  • FIG. 10 illustrates the threaded type body seat ring of tilting disc swing check valve.
  • FIG. 11 illustrates the rubber disc seat ring of tilting disc swing check valve.
  • FIG. 12 illustrates the metal disc seat ring of tilting disc swing check valve.
  • FIG. 13 illustrates the key of tilting disc swing check valve.
  • FIG. 14 illustrates the bushes of tilting disc swing check valve.
  • FIG. 15 illustrates the lever and weight of tilting disc swing check valve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

A Tilting Disc Swing Check Valve that allows liquid to flow only in single direction is disclosed herein. The valve opens when liquid flows. When the flow stops, weight of valve's closing mechanism will swing back to close position and halt backflow. The closing mechanism of Tilting Disc Swing Check Valve is a part of swinging disc, attached by a hinge, and set at the slant angle to provide quick closing and reduces water hammer. Its hinge pin axis could be placed either vertically and horizontally. The Tilting Disc Swing Check Valve is recommended to be installed adjacent to a pump in order to prevent the pump's damage cause by liquid's backflow, and when the pump needs to be shut down for maintenance.

Description

    BACKGROUND ARTS AND SCIENCES RELATED TO THE INVENTION
  • Water is a vital element of all lives in daily consumption since no plant or animal can survive without it. Nowadays, water supply system plays an important role, particularly to people in urban areas, supplying sufficient amount of clean water for residents as well as for extensive growth of the country's industrial and business development. At the same time, wastewater management system also becomes a major concern. In both water supply and wastewater systems, quality and efficiency of valves performs critical function in controlling pressure within pipelines. Various types of valves are hence designed to answer different objectives, from start and stop, control, inhibit backflow or redirecting flows. Tilting Disc Swing Check Valve is a type of valve that inhibits back flow. It is uniquely different from other conventional swing check valves. Generally, the disc of swing check valve will close slowly, and if there is any backflow in the pipeline, it will cause damages to the pump. If the disc closes fast, it will obstruct the water flow and create the water pressure losses during passing through the pipeline which called ‘Hear Loss’.
    • CHARACTERISTICS AND PURPOSE OF THE INVENTION
  • Tilting Disc Swing Check Valve allows liquid to flow only in single direction. It opens when liquid flows. When the flow stops, weight of valve's closing mechanism will swing back to close position and halt backflow. The closing mechanism of Tiling Disc Swing Check Valve is a part of swinging disc, attached by a hinge, and set at a slant angle to provide quick closing and reduce water hammer. Its hinge pin axis could be placed either vertically or horizontally. The Tilting Disc Swing Check Valve is recommended to be installed adjacent to a pump in order to prevent the pump's damage caused by liquid's backflow, and when the pump needs to be shut down for maintenance.
    • DISCLOSURE OF THE INVENTION
  • FIG. 1 illustrates the overall picture of tilting disc swing check valve, viewed three dimensionally and cross-sectional in angled position. Tilting disc swing check valve consists of Body (1), Cover (3) on top. Both parts are made of grey cast irons for operating pressure of not more than 10 bar, and spheroidal graphite cast iron for operating pressure of 16 bar and above. A cover gasket (14) is placed between the Body (1) and Cover (3). The body (1) and Cover (3) are held together with Cover bolt (13).
  • From the Body (1), there are square boss (18) protrude left and right, and End-Plate A (4) is placed with square Gasket (24) jointed on both sides The square boss (18) and the End-Plate A (4) is fit together with in End-Plated Bolt (11). At the lower part of the Body (1), a hollow cylindrical bar (25) protrudes perpendicularly to the Seat (17). End-Plate B (6) is fastened to the Body (1) with End-Plate Bolt (11).
  • FIG. 2 illustrates the tilting disc swing check valve, at its back view (water outlet). It shows the “small button” protruding from top flange of the Body (1) in order to limit an opening angle of the Disc (2). This part is called “Stopper (16)”.
  • FIG. 3 illustrates the tilting disc swing check valve in horizontal cut to show internal components, comprising of the Disc (2). The Disc (2) is made of spheroidal graphite cast iron, which will inhibit the flow in cases that there is no pressure or backflow in the pipeline. It will automatically open when pushed by fluid with enough pressure. An increasing amount of pressure will increase an opening angle of the Disc (2). However, a maximum angle of Disc (2) is limited by Stopper (16) that extrudes from the Body (1). This means the Disc (2) can open at maximum when operating pressure equals to an inclined degree between the Seat (17) and the Stopper (16), at the focal point on the center of hinge pin (9).
  • Disc Seat Ring (8) comes with two variations of materials. First is made of Nitrile Butadiene Rubber (NBR) or Ethylene Propylene Diene Rubber (EPDM). It has a round shape as shown in FIG. 11.
  • Second is made of metal-bronze or stainless steel. The metal Disc Seat Ring (8) comes in a similar shape of Body Seat Ring as shown in FIG. 12. Both types of Disc Seat Ring (8) can prevent leakage of any liquid around the seating surfaces. For the rubber Disc Seat Ring (8), one side of it will be fixed on the perimeter of the disc (19) as shown in FIG. 5. Another side will be pressed upon by Seat Holder (5) as shown in FIG. 7 which is made of spheroidal graphite cast iron, same material as the Disc (2). It holds the Disc Seat Ring (8) and the perimeter of the disc (19) together permanently and is also securely fastened by Seat Holder Bolt (12). Meanwhile, the metal Disc Seat (8) will be pressed up to the Disc (2), and will not need the Seat Holder (5).
  • FIG. 4 illustrates a cross-sectional and three dimensional view of the Body (1) showing internal structure consists of seating surface (17) in round shape. This area will be machined and provided with a groove for matching with a component called Body Seat Ring (7) which is made from bronze or stainless steel. For the valve with rubber Disc Seat Ring (8), Body Seat Ring (7) is as per FIG. 9. It will be assembled to the Body (1) by compression to increase the seating effectiveness of the Disc Seat Ring (8). For the valve with metal Disc Seat Ring (8), Body Seat Ring (7) is as per FIG. 10 and will be assembled to the Body (1) by threading. The surface of Body Seat Ring (7) that will contact with Disc seat ring (8) will be machined finely until it is very smooth. When the valve closed, and there is no any liquid or pressure in the pipeline, Disc Seat Ring (8) will be tightly pressed to Body Seat Ring (7) by the weight of the Disc (2). In case of backflow occurs, the Disc Seat Ring (8) will be tightly pressed to the Body Seat Ring (7), and inhibits the liquid passing the Disc (2).
  • FIG. 5 illustrates two views of the disc (2). Picture of the left is a back view, and picture on the right picture is the cut Section A-A picture, consist of the Disc (2) and two Arms (21). At the end of both arms (21), there is a boss (22) in round shape providing a groove (23) for the pin (10) The position of this groove will fit to the groove of hinge pin (9).
  • FIG. 6 illustrates the Cover (3) in a dome shape. It helps distribute energy of pressure. It prevents liquid leaks from top of the valve. Lifting Lug (26) at the top of cover is provided for easy handling especially in large valves.
  • FIG. 8 illustrates the Hinge Pin (9), a cylindrical bar with the length equals to dimension of square boss (18) that protrudes from left end and the right end of the Body (1). Made of stainless steel, it hooks the boss (22) of the Disc (2) to balance and align the Body Seat Ring (7) of the Body (1) and the Disc (2). At one end of the Hinge Pin (9), a square cut (28) is made in order to fix with weight (27) as shown in FIG. 13. In cases that the Disc (2) needs to be closed more rapidly, as in large valve, the boss (22) of the Disc (2) will be provided with groove (20) to fix the pin (10) at two ends as shown in FIG. 11. Made of stainless steel, the pin (10) holds the boss (22) of the disc (2) with hinge pin (9) securely to prevent the leakage.
  • The position of square boss (18) that protrude on both of left and right sides of the Body (1) will be drilled and insert with bushes (15) which is made of brass or bronze before assembling the Hinge Pin (9). The bushes (15) as shown in FIG. 12 will reduce the friction between square boss (18), which is made of spheroidal graphite cast iron and Hinge Pin (9) which of stainless steel and make the disc move easier.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 illustrates sectional view of tilting disc swing check valve showing internal components as three dimensional views.
  • FIG. 2 illustrates tilting disc swing check valve from the back side (water outlet).
  • FIG. 3 illustrates image cut lengthwise of tilting disc swing check valve for overall components in two dimensional views.
  • FIG. 4 illustrates the cut image of the body of tilting disc swing check valve showing the seating area.
  • FIG. 5 illustrates the disc of tilting disc swing check valve.
  • FIG. 6 illustrates the cover of tilting disc swing check valve.
  • FIG. 7 illustrates the seat holder of tilting disc swing check valve.
  • FIG. 8 illustrates the hinge pin of tilting disc swing check valve.
  • FIG. 9 illustrates the compressed type body seat ring of tilting disc swing check valve.
  • FIG. 10 illustrates the threaded type body seat ring of tilting disc swing check valve.
  • FIG. 11 illustrates the rubber disc seat ring of tilting disc swing check valve.
  • FIG. 12 illustrates the metal disc seat ring of tilting disc swing check valve.
  • FIG. 13 illustrates the key of tilting disc swing check valve.
  • FIG. 14 illustrates the bushes of tilting disc swing check valve.
  • FIG. 15 illustrates the lever and weight of tilting disc swing check valve.

Claims (11)

1-10. (canceled)
11. A tilting disc swing check valve comprising:
a body and a cover on top of the body,
wherein both parts are made of grey cast iron for an operating pressure of not more than 10 bar or a spheroidal graphite cast iron for an operating pressure of 16 bar and above,
wherein a cover gasket is placed between the body and the cover,
wherein the body and cover are held together with a cover bolt,
wherein the body contains square bosses protruding from left and right sides of the body, the square bosses being fixed with an end-plate A with a square gasket,
wherein at the lower part of the body, a hollow cylindrical bar protrudes perpendicularly to a seat, threaded by an end-plate B,
wherein a disc is made of spheroidal graphite cast iron, the disc inhibiting a flow when there is no pressure, as well as preventing backflow in a pipeline,
wherein the disc will automatically open when there is a fluid with enough pressure, and
wherein a higher pressure will lead to an increasing degree of the disc's opening angle, but not exceeding to a degree between a body seat ring and stopper, the disc having a center of a hinge pin as a rotating point.
12. The tilting disc swing check valve according to claim 11, wherein the valve further comprises a closing mechanism that includes the disc, a disc seat ring, and a seat holder assembled together,
wherein for the valve having a metal disc seat ring, the closing mechanism comprised of the disc and the disc seat ring, will swing by the hinge pin and will be closed by the weight of its own mechanism if there is no pressure or back pressure in the pipeline.
13. The tilting disc swing check valve according to claim 11, wherein a seating area is where the body seat ring touches a disc seat ring.
14. The tilting disc swing check valve according to claim 13, wherein the disc seat ring is made from a material chosen from the group consisting of: Nitrile Butadiene Rubber (NBR), Ethylene Propylene Diene Rubber (EPDM), bronze, and stainless steel.
15. The tilting disc swing check valve according to claim 13, wherein the body seat ring is made of bronze or stainless steel and is assembled to the body by compression for a valve having a rubber disc seat ring, and wherein for the valve having a metal disc seat ring, the body seat ring in the body is assembled by threading.
16. The tilting disc swing check valve according to claim 15, wherein the seating surface of the body seat ring is precisely machined to get a shining smooth surface, in order to increase the effectiveness of seating.
17. The tilting disc swing check valve according to claim 11, wherein the hinge pin is made of stainless steel and has a groove for putting a key to hold a boss of the disc tightly and centering the body seat with the disc.
18. The tilting disc swing check valve according to claim 11, wherein both of the square bosses at the left and right sides are drilled and inserted with bushes.
19. The tilting disc swing check valve according to claim 18, wherein the bushes are made of brass or bronze.
20. The tilting disc swing check valve according to claim 17, wherein the pin is made of stainless steel and can be replaced upon damage.
US12/882,767 2009-09-15 2010-09-15 Tilting Disc Swing Check Valve Abandoned US20110061751A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TH901004167A TH104274B (en) 2009-09-15 Sluice-type, swing-type water gate with an inclined tongue
TH0901004167 2009-09-15

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US20130037278A1 (en) * 2011-08-08 2013-02-14 The Reliable Automatic Sprinkler Co., Inc. Differential dry pipe valve
EP2610040A1 (en) * 2012-01-02 2013-07-03 Ludo Debergh Mixing apparatus and method for the production of composite material
CN104254722A (en) * 2011-12-02 2014-12-31 滨特尔流体服务股份公司 Quick maintenance undersea check valve
US20150362073A1 (en) * 2013-01-09 2015-12-17 Nifco Inc. Hole plug
US20160131392A1 (en) * 2014-11-12 2016-05-12 Canplas Industries Ltd. Gooseneck style vent
CN107477221A (en) * 2017-09-27 2017-12-15 济南迈克阀门科技有限公司 A kind of clamp connection swing check valve
US20190054507A1 (en) * 2015-05-21 2019-02-21 Mark Taylor Cleaning apparatuses for check valves
CN109404544A (en) * 2018-10-29 2019-03-01 镇江市鑫浩塑胶有限公司 A kind of compound double check valve (DCV) of copper modeling
CN110107717A (en) * 2019-04-02 2019-08-09 商文辉 A kind of noiseless check-valves of reversed pressure release type
US10961923B2 (en) * 2019-07-26 2021-03-30 Tenneco Automotive Operating Company Inc. Externally mounted in-line exhaust gas valve
US11274581B2 (en) 2019-07-26 2022-03-15 Tenneco Automotive Operating Company Inc. Externally mounted in-line exhaust gas valve
US11371402B2 (en) 2019-07-26 2022-06-28 Tenneco Automotive Operating Company Inc. Externally mounted in-line exhaust gas valve

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US2078375A (en) * 1935-07-24 1937-04-27 Frank G Eldridge Check valve
US2923317A (en) * 1955-11-17 1960-02-02 Crane Co Swing check valve
US2934084A (en) * 1954-04-12 1960-04-26 Boeing Co Butterfly check valves
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US5421594A (en) * 1991-02-14 1995-06-06 Marine & Petroleum Mfg., Inc. Gasket
US6679289B2 (en) * 2000-10-02 2004-01-20 Sure Seal, Inc. Swing check valve
US7249611B2 (en) * 2004-11-16 2007-07-31 Valve Innovations, L.L.C. Check valve
US20090038694A1 (en) * 2005-05-17 2009-02-12 Miroslaw Szuster Ball non-return valve
US7673695B2 (en) * 2006-06-02 2010-03-09 The Reliable Automatic Sprinkler Co., Inc. Dry pipe/deluge valve for automatic sprinkler systems

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US2078375A (en) * 1935-07-24 1937-04-27 Frank G Eldridge Check valve
US2934084A (en) * 1954-04-12 1960-04-26 Boeing Co Butterfly check valves
US2923317A (en) * 1955-11-17 1960-02-02 Crane Co Swing check valve
US3987529A (en) * 1971-11-01 1976-10-26 Asahi Kasei Kogyo Kabushiki Kaisha Valve and method for manufacturing the same
US5421594A (en) * 1991-02-14 1995-06-06 Marine & Petroleum Mfg., Inc. Gasket
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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